Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Design of Transmission Shafts01:16

Design of Transmission Shafts

The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Design of Transmission Shafts - Stress Analysis01:15

Design of Transmission Shafts - Stress Analysis

Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
Transmission of Pathogens01:24

Transmission of Pathogens

Pathogens spread from their reservoirs to susceptible hosts through three main routes: contact transmission, vehicle transmission, and vector transmission. Each route involves distinct mechanisms of transfer.Contact TransmissionThis category includes direct contact, indirect contact, and droplet transmission:Direct contact involves immediate physical interaction between individuals—such as a handshake—which can spread pathogens like Streptococcus pyogenes, the bacterium responsible for...
Journal Bearings01:23

Journal Bearings

Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
Bearings: Problem Solving01:24

Bearings: Problem Solving

Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Potential of Skin Microbiome, Pro- and/or Pre-Biotics to Affect Local Cutaneous Responses to UV Exposure.

Nutrients·2020
Same author

Pre-operative Obesity-Associated Hyperandrogenemia in Women and Hypogonadism in Men Have No Impact on Weight Loss Following Bariatric Surgery.

Obesity surgery·2020
Same author

Dithranol targets keratinocytes, their crosstalk with neutrophils and inhibits the IL-36 inflammatory loop in psoriasis.

eLife·2020
Same author

Psychopharmacological Medication Has No Influence on Vitamin Status After Bariatric Surgery in Long-term Follow-up.

Obesity surgery·2020
Same author

Ictal quantitative surface electromyography correlates with postictal EEG suppression.

Neurology·2020
Same author

The "Epileptic Heart" and the "cardiovascular continuum".

Epilepsy & behavior : E&B·2020

Related Experiment Video

Updated: Jul 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Transmissions within the tarsal gearbox.

Peter Wolf1, Alex Stacoff, Roger Luechinger

  • 1Institute for Biomechanics, ETH Zurich, Zurich, Switzerland. pwolf@ethz.ch

Journal of the American Podiatric Medical Association
|January 19, 2008
PubMed
Summary

Tibiocalcaneal rotations effectively predict tarsal joint movements within the tarsal gearbox, enabling rearfoot kinematics analysis using standard motion capture. This study models the tarsal gearbox under quasi-static conditions.

More Related Videos

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound
07:41

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound

Published on: January 7, 2019

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel
08:27

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Related Experiment Videos

Last Updated: Jul 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound
07:41

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound

Published on: January 7, 2019

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel
08:27

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Area of Science:

  • Biomechanics
  • Orthopedics
  • Kinesiology

Background:

  • The tarsal gearbox describes interdependent movements of the calcaneus, cuboid, navicular, and talus.
  • Understanding these transmissions is crucial for biomechanical modeling.
  • Investigating tibiocalcaneal rotations' predictive power for tarsal joint rotations is key for utilizing common motion analysis techniques.

Purpose of the Study:

  • To establish a basis for modeling the tarsal gearbox.
  • To determine the feasibility of using tibiocalcaneal rotations to predict tarsal joint rotations.
  • To enable rearfoot kinematics investigation using skin marker-based motion analysis.

Main Methods:

  • Linear regression analyses were performed.
  • Data were derived from magnetic resonance imaging of tibia and tarsal bone positions.
  • Analyses focused on quasi-static foot pronation and supination.

Main Results:

  • Linear models accurately predicted tarsal joint rotations in frontal (r(2)=0.83-0.97) and transverse (r(2)=0.73-0.95) planes.
  • Specific rotation ratios were quantified between talocalcaneal, talonavicular, calcanealcuboid, and tibiocalcaneal joints.
  • Tibiocalcaneal rotations showed strong correlations with talocalcaneal (r(2)=0.9) and talonavicular (r(2)=1.3-1.6) rotations.

Conclusions:

  • A foundation for modeling the tarsal gearbox in frontal and transverse planes under quasi-static conditions has been established.
  • Tibiocalcaneal rotations are practical predictors of tarsal joint rotations during quasi-static movements.
  • This research supports the use of tibiocalcaneal rotations in clinical motion analysis for assessing rearfoot kinematics.